Knife wiper attachment for typesetting machines



May 2, 1933* K. ENGEL 1,907,401

KNIFE WIPER ATTACHMENT FOR TYPESETTING MACHINES Filed May 10, 1932 INVENTOR wnwggsszs fir! E12 eZ 47 E W BY M 6;

ATTCRNEY Patented May 2, 1933 UNITED STATES KARL ENGEL, OF N EW YORK, N. Y.

KNIFE WIPER ATTACHIMENT FOB TYPESETTING MAGHINES Application filed May 10,

This invention has generally reference to typesetting machines, and pertains more particularly to an attachment for the knife wiper assembly to improve the functioning of this element of the machine.

It has been observed that not infrequently the type face of a slug picks up the trimmings which have been trimmed from the sides of a preceding slug, due to the fa'ilure of the knife wiper or flag to completely and efiectually coact with the knives and wipe away said trimmings before the suc ceeding slug is ejected and fed between the knives. As a consequence, the unremoved trimmings frequently are picked up and adhere with such tenacity to the type face of the succeeding slug, which is still warm, that the usual brushing operation fails to remove these foreign particles and, hence, when 29 the type is run through the proof press, said trimming particles are embedded in the type faces and in the interstices of the type, thereby necessitating recasting and resetting of the slug, which materially adds to the expense of the typesetting operation.

It has further been noted that heretofore there is at times a tendency for the knife wiper to hang or bind so that it fails to gravitate to its lowest position, thus resulting in either the breakage of the knife wiper, spoilage of the succeeding slugs, or both. In event of breakage of the knife wiper, it is apparent that a large number of succeeding slugs will pick up the trimmings of the preceding slugs, due to the fact that there is no knife wiper or flag to function to remove the slug trimmings.

In order to eleminate the above mentioned defects and to provide means which insures an effectual functioning of the knife wiper, the present invention comprehends an attachment which cooperates with the knife wiper assemblage to insure a thorough and efiectual removal of the trimmings from the knife blades, and this without interfering with or hampering the proper movement of the knife wiper bar.

As a further object, the invention aims to provide an attachment of the indicated character which is extremely simple in its con- 1932. Serial No. 610,444.

struction, inexpensive to produce and install and which is highly efficient in its purpose. With the above recited and other objects in view, reference is had to the following description and accompanying drawing, in which there is exhibited one example or embodiment of the invention, while the claim define the actual scope of the same.

In the drawing:

Figure 1 is a fragmentary side view of C9 the knife wiper assemblage equipped with an attachment constructed in accordance with the invention. v

Figure 2 is a fragmentary face viewthereof as viewed from the inner or rear side of the knife'block.

Figure 3 is a collective perspective view of the improved knife wiper bar plate and the tension adjusting screw.

Figure 4 is a perspective view of the tensioning arm attachment removed from the machine.

Referring to the drawing by characters of reference, A'designates a portion of the knife block assemblage, B and C the right and left knives, between the cutting edges D and E of which the slugs are passed to trim the sides as they are ejected from the mold disk. The lower mold banking block F is provided with the usual vertical groove G, in which the knife wiper bar H is guided for vertical movement, being raised through the medium of the knife wiper bar link I by the knife wiper lever J The usual knife wiper or flag K is detachably secured to the upper end of the knife wiper bar H by screws L and, as is customary, the knife wiper bar and knife wiper or flag are moved downwardly by gravity.

Ordinarily, the" knife wiper bar is maintained in the groove G by the knife wiper bar plate here designated by the reference character 5, which in the present instance is slightly different from the usual plate. The attachment in the present instance essentially Q5 consists of a spring arm 6 which is formed at one end with screw holes 7 to receive therethrough the usual screws M which secure the knife wiper bar plate over the groove G. The

other end of the arm 6 supports a roller 8 which is designed to bear against the surface N of the knife wiper bar H, which is also guided in a lower bearing 0. The roller 8 may be supported in any desired manner, but in the present instance, the arm 6 is slotted longitudinally inward from its end, as at 9, to provide a pair of bifurcations 10 which are rolled about the roller shaft 11. In practice, the arm 6 is of a spring or other resilient metal and is preferably tapered or of gradually reducing width from its apertured anchored end toward the free end.

In order to provide means for varying the tension, the knife wiper bar plate 5 in the present instance is substituted for the usual plate, and the substitute plate 5 is formed with an offset depending lug l2 having a threaded aperture which receives there through a tension regulating screw 18 having a head 14 to facilitate turning of the same for effecting regulation of the tension of the arm. If desired, a binding nut 15 may also be employed for locking the screw in its adjusted position.

WVith the'attachment applied as illustrated, the knife wiper bar is mounted for guided vertical movement in the groove G and is maintained therein by the upper anchored end of the arm 6 which bridges the grooved portion of the lower mold banking block F. The screw 13 when properly adjusted causes the resilient arm 6 to impinge the periphery of the roller 8 against the surface N of the knife wiper bar, thereby insuring proper wiping engagement of the wiper or flag K with the cutting edges D and E of the knives B and C. This insures the complete and efiectual removal of the slug trimmings of a preceding slug from the knives and precludes any possiblity of marring of the type face and type of a succeeding slug. Furthermore, the high degree of accuracy and precision with which the tension of the spring arm may be controlled positively insures against hanging of the knife wiper and makes certain of the gravitational movement of the wiper or flag to its lowermost position, where it will not interfere with and mar the slugs as they are being ejected and fed between the knives.

lVhile there has been illustrated and described a single and preferred embodiment of the invention, it is to be clearly understood that no limitation is intended to the precise structural details herein exhibited, and that variations and modifications thereof which properly fall within the scope of the appended claims may be resorted to when desired.

WVhat is claimed is:

1. An attachment of the character set forth for the purpose specified including a resilient arm having an apertured end adapt-ed for anchorage to the lower mold banking block by the screws of the knife wiper bar plate and an anti-friction roller carried by the other end of the arm for turning movement on an axis transverse the length of the plate and parallel to the width of the plate and a knife wiper bar plate including a depending offset lug and a tension adjusting screw threaded therethrough for engagement with said spring arm to regulate the tension thereof.

2. An attachment of the character set forth for the purpose specified including a resilient arm having an apertur-ed end adapted for anchorage to the lower mold banking block by the screws of the knife wiper bar plate and an anti-friction roller carried by the other end of the arm for turning movement on an axis transverse to the length of the plate and parallel to the width of the plate KARL EN GEL. 

